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Upca.php
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Upca.php
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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode2_Driver_Upca class
*
* Renders UPC-A barcodes
*
* PHP versions 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Image
* @package Image_Barcode2
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @link http://pear.php.net/package/Image_Barcode2
*/
require_once 'Image/Barcode2/Driver.php';
require_once 'Image/Barcode2/Common.php';
require_once 'Image/Barcode2/Exception.php';
/**
* UPC-A
*
* Package which provides a method to create UPC-A barcode using GD library.
*
* Slightly Modified Ean13.php to get Upca.php I needed a way to print
* UPC-A bar codes on a PHP page. The Image_Barcode2 class seemed like
* the best way to do it, so I modified ean13 to print in the UPC-A format.
* Checked the bar code tables against some documentation below (no errors)
* and validated the changes with my trusty cue-cat.
* http://www.indiana.edu/~atmat/units/barcodes/bar_t4.htm
*
* @category Image
* @package Image_Barcode2
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Barcode2
*/
class Image_Barcode2_Driver_Upca extends Image_Barcode2_Common implements Image_Barcode2_Driver
{
/**
* Coding map
* @var array
*/
private $_codingmap = array(
'0' => array(
'L' => array(0,0,0,1,1,0,1),
'R' => array(1,1,1,0,0,1,0)
),
'1' => array(
'L' => array(0,0,1,1,0,0,1),
'R' => array(1,1,0,0,1,1,0)
),
'2' => array(
'L' => array(0,0,1,0,0,1,1),
'R' => array(1,1,0,1,1,0,0)
),
'3' => array(
'L' => array(0,1,1,1,1,0,1),
'R' => array(1,0,0,0,0,1,0)
),
'4' => array(
'L' => array(0,1,0,0,0,1,1),
'R' => array(1,0,1,1,1,0,0)
),
'5' => array(
'L' => array(0,1,1,0,0,0,1),
'R' => array(1,0,0,1,1,1,0)
),
'6' => array(
'L' => array(0,1,0,1,1,1,1),
'R' => array(1,0,1,0,0,0,0)
),
'7' => array(
'L' => array(0,1,1,1,0,1,1),
'R' => array(1,0,0,0,1,0,0)
),
'8' => array(
'L' => array(0,1,1,0,1,1,1),
'R' => array(1,0,0,1,0,0,0)
),
'9' => array(
'L' => array(0,0,0,1,0,1,1),
'R' => array(1,1,1,0,1,0,0)
)
);
/**
* Class constructor
*
* @param Image_Barcode2_Writer $writer Library to use.
*/
public function __construct(Image_Barcode2_Writer $writer)
{
parent::__construct($writer);
$this->setBarcodeHeight(50);
$this->setBarcodeWidth(1);
}
/**
* Validate barcode
*
* @return void
* @throws Image_Barcode2_Exception
*/
public function validate()
{
// Check barcode for invalid characters
if (!preg_match('/^[0-9]{12}$/', $this->getBarcode())) {
throw new Image_Barcode2_Exception('Invalid barcode');
}
}
/**
* Draws a UPC-A image barcode
*
* @return resource The corresponding UPC-A image barcode
*
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
*/
public function draw()
{
$text = $this->getBarcode();
$writer = $this->getWriter();
$fontsize = $this->getFontSize();
// Calculate the barcode width
$barcodewidth = (strlen($text)) * (7 * $this->getBarcodeWidth())
+ 3 // left
+ 5 // center
+ 3 // right
+ $writer->imagefontwidth($fontsize) + 1
+ $writer->imagefontwidth($fontsize) + 1 // check digit padding
;
$barcodelongheight = (int)($writer->imagefontheight($fontsize) / 2)
+ $this->getBarcodeHeight();
// Create the image
$img = $writer->imagecreate(
$barcodewidth,
$barcodelongheight + $writer->imagefontheight($fontsize) + 1
);
// Alocate the black and white colors
$black = $writer->imagecolorallocate($img, 0, 0, 0);
$white = $writer->imagecolorallocate($img, 255, 255, 255);
// Fill image with white color
$writer->imagefill($img, 0, 0, $white);
// get the first digit which is the key for creating the first 6 bars
$key = substr($text, 0, 1);
// Initiate x position
$xpos = 0;
// print first digit
if ($this->showText) {
$writer->imagestring(
$img,
$fontsize,
$xpos,
$this->getBarcodeHeight(),
$key,
$black
);
}
$xpos = $writer->imagefontwidth($fontsize) + 1;
// Draws the left guard pattern (bar-space-bar)
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
// space
$xpos += $this->getBarcodeWidth();
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
foreach ($this->_codingmap[$key]['L'] as $bar) {
if ($bar) {
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
}
$xpos += $this->getBarcodeWidth();
}
// Draw left $text contents
for ($idx = 1; $idx < 6; $idx ++) {
$value = substr($text, $idx, 1);
if ($this->showText) {
$writer->imagestring(
$img,
$fontsize,
$xpos + 1,
$this->getBarcodeHeight(),
$value,
$black
);
}
foreach ($this->_codingmap[$value]['L'] as $bar) {
if ($bar) {
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$this->getBarcodeHeight(),
$black
);
}
$xpos += $this->getBarcodeWidth();
}
}
// Draws the center pattern (space-bar-space-bar-space)
// space
$xpos += $this->getBarcodeWidth();
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
// space
$xpos += $this->getBarcodeWidth();
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
// space
$xpos += $this->getBarcodeWidth();
// Draw right $text contents
for ($idx = 6; $idx < 11; $idx ++) {
$value = substr($text, $idx, 1);
if ($this->showText) {
$writer->imagestring(
$img,
$fontsize,
$xpos + 1,
$this->getBarcodeHeight(),
$value,
$black
);
}
foreach ($this->_codingmap[$value]['R'] as $bar) {
if ($bar) {
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$this->getBarcodeHeight(),
$black
);
}
$xpos += $this->getBarcodeWidth();
}
}
$value = substr($text, 11, 1);
foreach ($this->_codingmap[$value]['R'] as $bar) {
if ($bar) {
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
}
$xpos += $this->getBarcodeWidth();
}
// Draws the right guard pattern (bar-space-bar)
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
// space
$xpos += $this->getBarcodeWidth();
// bar
$writer->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$barcodelongheight,
$black
);
$xpos += $this->getBarcodeWidth();
// Print Check Digit
if ($this->showText) {
$writer->imagestring(
$img,
$fontsize,
$xpos + 1,
$this->getBarcodeHeight(),
$value,
$black
);
}
return $img;
}
} // class